The problem is content exclusivity. It would be great if all the content or at least most would be available on all platforms. At least eventually. That would be great for consumers. Mergers like this typically not.

Like we had for music on the radio, compulsory licensing

We could do that by limiting copyright to just 10-14 years. All platforms could have all that content forever without paying a dime. New stuff and exclusives would still be a draw to attract people to one platform or another.